Lath.



J. S. & R. ANDERSON.

LATH.

APPLICATION FILED JUNE 22, 1911.

1,014,557, Patented Jan.9,1912.

UNITED STATES PATENT OFFICE. f

JAMES S. ANDERSON AND ROY ANDERSON, OF WARDNER, BRITISH COLUMBIA,CANADA.

LATH.

Specification of Letters Patent.

Application filed June 22, 1911.

To all whom it may concern Be it known that We, J AMES S. ANDERsoN andROY ANDERSON, residing at Wardner, Province of British Columbia, andDominion of Canada, have invented certain new and useful Improvements inLaths, of which the following is a specification.

Our invention relates to improvements in building laths and has for itsleading object the provision of an improved form of lath which may bereadily secured in position and which will permit of considerableexpansion and contraction of the said laths without pulling loose fromthe plaster or warping to render the plaster uneven or to break thesame. A further object of our invention is the provision of an improvedlath which may be easily manufactured and which can be quickly andeasily placed and secured in position, and in which the placing of theplaster or coating over the laths will serve to more firmly connect thesaid laths and retain them in position while also firmly engaging andsecuring the plaster upon the laths.

Other objects and advantages of our improved construction of laths willbe apparent from the following description taken in connection with theaccompanying drawings, and it will be understood that we may make anymodifications in the specific structure shown and described within thescope of the claim without departing from or exceeding the spirit of theinvention.

Figure 1 represents an edge view of our improved lath, and Fig. 2represents a sectional portion of a wall having our laths embeddedtherein.

In the drawings, the numeral 1 designates the body portion of our lathor sheathing board, which board or lath may be of any desired width andthickness, the size of the lath or board being immaterial to theconstruction of our invent-ion. Said lath has preferably the roughenedouter face 2 to enable the plaster to stick more readily thereto, whileto further facilitate the adherence of the plaster to the laths, we formin the outer face of the laths the two diverging longitudinal grooves 3disposed at a plurality of points along the width of the laths, saidgrooves having the inverted V'- shaped portions 4 projecting upwardtherebetween as will be readily understood by reference to the drawings.

To cause the plaster to be securely engaged at the edges of the lathsand also to cause the plaster to form uniting cement between the twoedges of adjacent laths, we form in the outer face of the laths at eachedge the inwardly flaring beveled groove or recess 5, the plasterfitting into the inwardly flaring recess formed by the meeting edges ofthe laths with their grooves and being thus securely retained whileconnecting the said edges of the laths.

It is a well known fact that laths being necessarily of cheapconstruction are frequently formed from poorly seasoned lumber, and whensaid lumber is moistened by the placing of the wetplaster thereon itwill naturally swell, while later contracting or shrinking when theplaster dries. To allow of the expansion and contraction of our laths weform in the back thereof the V- shaped grooves 6 which extend upwardinto the pyramids 4 and have their apexes 7 projecting slightly abovethe bottoms 8 of the grooves 3 while we further form at the edges of ourlaths the angular cuts 9, when the laths are connected said cutstogether f0rming the V-shaped recess 10 on the back of the meetingedges.

From the foregoing description taken in connection with the drawings,the construction of our improved laths will be readily understood and itwill be seen that upon shrinkage of the laths the portions 4; will actas spring arches to expand slightly to allow the laths to yield at thispoint without pulling loose from the studding 11 to which they aresecured, while upon swelling of the laths said spring arches willbecompressed toward each other and prevent buckling'of the laths.

We claim A lath, comprising a Wooden strip having a plurality of pairsof diverging grooves formed in one face and extending transversely ofthe strip partially through the diverging grooves.

thickness thereof, and said strip having a V- In testimony whereof Weaflix our signashaped groove formed in its opposite face tures, inpresence of two Witnesses.

with the apex of the groove in alinement JAMES S. ANDERSON. With thepyramid formed between the di- ROY ANDERSON. verging grooves, saidV-shaped groove hav- Witnesses:

ing its apex disposed beyond the bases of the WALTER E. ANDERSON,

ALICE EMB'REE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

